Audio wise, the feedback is there and the music is not intrusive (rather jolly and feels like old school RPGs). Graphics I also enjoyed. It's a rather unique take on the theme. As mentioned before, the perspective was a little bit misleading at times. I also found myself thinking that maybe it should've played from top to bottom instead (for tetris familiarity) but this is obviously a question of game design. I think that way this would actually work pretty nicely on mobile.
Overall I can definitely see that you have put thought and care into this. So for that, bonus points already. It feels more like an actual game in progress and less of a hurried entry. I appreciate you using the same mechanic to enhance level design, rather than pushing more and more mechanics into it before I can learn one.